Wire spring for cushioned seats of vehicles



Aug. 23, 1938. M. FREUND 8 WIRE'SPRING FOR CUSHIONED SEATS OF VEHICLES Filed Nov. 9, 1935 f 2 Sheets-Sheet l 6 F'IE- 1 INVENTOR NORRIS .F'REUND m/m] Q. ATTORNE Aug. 23,1938. QILFIIREUND; 2,127,558

WIRE SPRING FOR CUSHIONED SEATS OF VEHICLES Fild Nov. 9, 1955 2 Sheets-Sheet 2 INVENTOR NORRIS FREU/VD @ELQQ.

ATTOR N EY iatented Aug. 23, 1938 UETED STATES PATENT OFFICE.

WIRE SPRING FOR CUSHIONED SEATS F VEHICLES Morris Freund, Cleveland, Ohio, assignor, by direct and mesne assignments, of one-half to Jacob Kronhein'i, Shaker Heights, Ohio, and one-half to John 0. Lincoln, Scottsdale, Ariz.

Application November 9, 1935, Serial No. 19,089

1 Claim.

vertical and lateral stresses, however the springsin present day seat frames for moving vehicles merely counteract vertical stresses, whereas lateral stresses, due to change of the traveling speed of the vehicle, are unchecked and free to unbalance the cushioning eifect of the seat frames in moving vehicles.

It is the primary object 'of this invention to provide a springfor seat frames of moving vehicles, which spring will counteract vertical and lateral stresses under load, when the vehicle is travelling at variable speeds.

Another object of the invention is the provision of a spring for use in seat frames of moving vehicles, which spring embodies a resilient, vertically and laterally shiftable, load supporting portion, and means at opposite ends of said portion for resiliently counteracting vertical and lateral stresses on said portion.

A further object of the invention is the provision of a spring of the type referred to above in which the resilient means at opposite ends of the load supporting portion differ in resiliency, so as to effect an increase and/or decrease in the stiffness of this portion proportionate to the vertical and lateral stresses.

In addition the invention has certain other marked superiorities, which radically distinguish it from presently known structures. These improvements or superior characteristics embodying certain novel features of construction are clearly set forth in the appended claim, and a preferred form of embodiment of the invention is hereinafter shown with reference to the accompanying drawings forming part of the specification.

In these drawings:

Figure 1 is a plan view of a seat frame of a cushioned automobile seat embodying individual, vertical and lateral stresses absorbing springs according to the invention.

Figure 2 is an enlarged cross sectional view through the seat frame structure shown in Figure 1, the section being taken on line 2-2 of Figure 1.

Figure 3 is a perspective viewof one of the springs used in the frame shown in Figure 1.

Figure 4 is a cross sectional view similar to Figure 1 of a seat frame embodying a somewhat modified and simplified sheet metal base member.

Figure 5 isv a cross sectional view similar to Figure 4 of a seat frame embodying somewhat modified spring structures.

Figure 6 is a fragmentary perspective view of the sheet metal base member shown in Figure 4.

Figure '7 is a perspective view of one of the spring tie members used to tie the individual springs of the seat frame shown in Figure 1.

Referring more particularly to the drawings reference numeral 2 represents a seat frame of a cushioned automobile seat, which frame embodies an elongated wooden base 3, supporting a plurality of elongated springs 4. The springs 4,

so that arm 8 offers less bending resistance than- The arms 8 and 9 are furthermore proarm 9. vided with perforated extensions l2 and it, which are arrangedin planes inclined with respect to the plane in which extends the straight portion 1, so that, when the springs are secured to the front and rear rails of the base 4 by means of bolts IS, the coiled or looped portions ill and II of the arms 8 and 9 are under tension and by submitting part of this tension to the portion 1,

bulge this portion outwardly, as will be clearly seen in Figure 2.

The arm 8 at the front of the portion 1 is substantially longer than the arm 9 at the rear thereof, and the looped portion I0 is of less bending resistance than the'looped portion ll, therefore the spring structure yieldingly resists a downward bulging of its portion 1 proportionate to the load and also absorbs stresses on the load caused by acceleration and/or deceleration of the vehicle movement, when the longitudinal axis of the spring extends substantially in the direction of travel of the vehicle embodying a seat frame with springs according to the invention.

Thus under load lever arms 8 and 8, both of which extend rearwardly and downwardly, effect a forward and downward movement of the sup porting portions of the springs, when the springs are under load and when the forward travel of the vehicle, embodying seat frames ofthe type springs is due to the inertia of the'ioad, tending to continue to travel at unretarded speed, itbeing understood that the load transfers its move-'- ment to the supportingportion of the spring onwhich the load rests. Consequently the thus induced forward and downward movement of the supportingportion of the spring yieldinglye-iik sorbs braking shocks on the load. An accelerated forward movement of the vehicle of course-will effect a rearward and upward shock absorbing movement of the supporting portions of the springs and the load carried thereby. A The supporting portions of the springs suppo at their front and rear ends an edge wire ii.-

To that effect the front ends of the,supporting portions are bent to open sleeves I I adapted to yieldingly and pivotally clamp and support the edge wire i6, and the rear ends of the supporting portions 1 are downwardly offset to form a seat i8 for slidably supporting the wire it and permit of individual free bending action of the springs with respect to the edge wire il. Furthermore, the individual springs C are laterally yieldingly tied together by means 'ofshort, flat springs [9, having their hooked ends 20 inserted in perforations v2|.in the supporting portions 1 of the springs 4.

In some cases it might be desirable to use a metal base 22 (see Figure 4) instead of the wooden base shown in Figures 1 and 2. This base consists of sheet metal, which is doubled back upon itself, so that the perforated ends 12- and ll of the springs 4 can readiiybe sprung into the space 23 between the opposed top and bottom walls 24 and 25 of the base 22 and riveted thereto by means of rivets 28.

If it is desirable to make the seating surface I time. Such a construction is shown in Figure In thisstructure the front-and roar arms I and g arranged between its opposite ends and prohibits excessive downward deflection of the spring subdivisions.

I 9,197,668 described, is retarded. Such a movement of the I wider, as for example for davenports, the length of the supporting portions oi springs should be subdivided into shortersir? I of the spring 21 are similar to those-in Fig ares 1,42 and 3. The seating portion In or the I.

spring 21, however 'lembodies two portions 10, which portions are yieldingly supported at their 7 inner ends by integral looped arms a, I. These arms are rigidly connected to a cross member 3! ma frame my means of rivets Id. The spring 21 thus embodies an additional support for its'supporting portion In, which support is under load. The subdivisions 20.1! are preferably tied together-f iry a 'short sflfl coil spring a,

- one of'said supporting means and said supporting portion for'pivotally attaching an edge wire member thereto, and an ofl'set, substan ially horizontal seating portion for said edge wire bo-- tween said supporting portion and the other one of said supporting means to permit of free bendi ing of said supporting portion with'respect to the edge wire carried thereby. r

1 MORRIS 

